Your patron has granted you a range of spells. You should be grateful.
Life Siphon
Tier 1, Single TargetConsume 1 of your own Hit Dice, and force a creature to make a STR save. On a failure the creature takes 2d[(its) HIT DICE] necrotic damage or half as much on a success. You heal the amount of damage the creature takes.
Morass
Tier 1, AoECube 4, centered on a point up to 8 reach away. 1d8 + LVL necrotic on a failed DEX save, or 1/2 as much on a successful DEX save. Effect: Difficult terrain within cube until the end of the encounter.
Fleshcurse
Tier 2, Single TargetA creature is secretly cursed. The next time they inflict damage, they suffer 2x that damage (ignores armor), and are inflicted with one of the following conditions: Dazed, Frightened, or Charmed until the end of your next turn.
Parasitic Command
Tier 2, Single TargetWhen attacked by a creature within range, defend for free. Move the attacker 1 space. If this triggers attacks of opportunity, they are made at advantage, not disadvantage. Additionally, if this would cause you to no longer be a valid target by the attacker, the attack misses instead.
Mycelium Strands
Tier 3, AoEMove creatures in a Cube 4 a total of 2d6 spaces, divided among them as you choose.
Shroomify
Tier 3, Single TargetOn a failed WIL save, turn a creature into a harmless, armor-less, tiny, mushroom for up to 1 minute. They can't move or attack. On a save, they're partially transformed, only reducing their armor to non instead. Damaging or casting this on another target ends the effect.
Circle of Mushrooms
Tier 4, Single TargetFill every empty adjacent space around a creature with a growth of poisonous mushrooms. Creatures who enter the area must make a DEX save or take KEYd6 necrotic damage and become either Dazed, Frightened, or Charmed. Lasts 1 minute or until it has dealt damage 3 times.
Tramediction
Tier 4, Multi-TargetAttack up to KEY creatures.
Terror
Tier 5, Single TargetA creature becomes frightened, unless immune to fear, for 1 minute.